Question: Top lube?
Answer: Most racers I have talked to have good success with top lube to inhibit corrosion. Some previous info mentioned some accumulation over time. The reason NHRA and IHRA do not allow it in fuel checks is they cannot distinguish between power enhancing additives (illegal) and top lube in their tests. So you are stuck with the mostly pure stuff for the national and divisional class racing. More info on top lubes in 5000 Horsepower on Methanol.